package com.gljx.util;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.LinkedList;
import java.util.List;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

/**
 * Excel导入工具类
 *
 * @Author： 吴联发
 *
 * @Date：2018年5月11日上午10:49:09
 */
public class ImportExcelUtil_MrWu {
	/*
	 * 判断Excel后缀格式
	 *
	 * @Author： 吴联发
	 *
	 * @Date：2018年5月11日上午10:52:11
	 */
	public List<List<Object>> importExcel(File file) throws IOException {
		String fileName = file.getName();
		String extension = fileName.lastIndexOf(".") == -1 ? "" : fileName.substring(fileName.lastIndexOf(".") + 1);
		if ("xls".equals(extension)) {
			return read2003Excel(file);
		} else if ("xlsx".equals(extension)) {
			return read2007Excel(file);
		} else {
			throw new IOException("不支持的文件类型");
		}
	}

	/*
	 * 读取2003Excel
	 *
	 * @Author： 吴联发
	 *
	 * @Date：2018年5月11日上午10:50:02
	 */
	private List<List<Object>> read2003Excel(File file) throws IOException {
		List<List<Object>> list = new LinkedList<List<Object>>();
		HSSFWorkbook hwb = new HSSFWorkbook(new FileInputStream(file));
		HSSFSheet sheet = hwb.getSheetAt(0);
		Object value = null;
		HSSFRow row = null;
		HSSFCell cell = null;

		for (int i = sheet.getFirstRowNum(); i <= sheet.getPhysicalNumberOfRows(); i++) {
			row = sheet.getRow(i);
			if (row == null) {
				continue;
			}
			List<Object> linked = new LinkedList<Object>();
			for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) {
				cell = row.getCell(j);
				if (cell == null) {
                    linked.add("");
					continue;
				}
				DecimalFormat df = new DecimalFormat("0.00");// 格式化 number String 字符
				SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");// 格式化日期字符串
				DecimalFormat nf = new DecimalFormat("0.00");// 格式化数字
				switch (cell.getCellType()) {
					case XSSFCell.CELL_TYPE_STRING:
						// System.out.println(i+"行"+j+" 列 is String type");
						value = cell.getStringCellValue();
						break;
					case XSSFCell.CELL_TYPE_NUMERIC:
						// System.out.println(i+"行"+j+" 列 is Number type ;
						// DateFormt:"+cell.getCellStyle().getDataFormatString());
						if ("@".equals(cell.getCellStyle().getDataFormatString())) {
							value = df.format(cell.getNumericCellValue());
						} else if ("General".equals(cell.getCellStyle().getDataFormatString())) {
							value = nf.format(cell.getNumericCellValue());
						} else {
							value = sdf.format(HSSFDateUtil.getJavaDate(cell.getNumericCellValue()));
						}
						break;
					case XSSFCell.CELL_TYPE_BOOLEAN:
						// System.out.println(i+"行"+j+" 列 is Boolean type");
						value = cell.getBooleanCellValue();
						break;
					case XSSFCell.CELL_TYPE_BLANK:
						// System.out.println(i+"行"+j+" 列 is Blank type");
						value = "";
						break;
					default:
						// System.out.println(i+"行"+j+" 列 is default type");
						value = cell.toString();
				}
				if (value == null || "".equals(value)) {
                    value="";
				}
				linked.add(value);
			}
			list.add(linked);
		}
		return list;
	}

	/*
	 * 读取2007Excel
	 *
	 * @Author： 吴联发
	 *
	 * @Date：2018年5月11日上午10:50:39
	 */
	private List<List<Object>> read2007Excel(File file) throws IOException {
		List<List<Object>> list = new LinkedList<List<Object>>();
		// 构造 XSSFWorkbook 对象，strPath 传入文件路径
		XSSFWorkbook xwb = new XSSFWorkbook(new FileInputStream(file));
		// 读取第一章表格内容
		XSSFSheet sheet = xwb.getSheetAt(0);
		Object value = null;
		XSSFRow row = null;
		XSSFCell cell = null;
		for (int i = sheet.getFirstRowNum(); i <= sheet.getPhysicalNumberOfRows(); i++) {
			row = sheet.getRow(i);
			if (row == null) {
                continue;
			}
			List<Object> linked = new LinkedList<Object>();
			for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) {
				cell = row.getCell(j);
				if (cell == null) {
                    linked.add("");
                    continue;
				}
				DecimalFormat df = new DecimalFormat("0");// 格式化 number String 字符
				SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");// 格式化日期字符串
				DecimalFormat nf = new DecimalFormat("0");// 格式化数字
				switch (cell.getCellType()) {
					case XSSFCell.CELL_TYPE_STRING:
						// System.out.println(i+"行"+j+" 列 is String type");
						value = cell.getStringCellValue();
						break;
					case XSSFCell.CELL_TYPE_NUMERIC:
						// System.out.println(i+"行"+j+" 列 is Number type ;
						// DateFormt:"+cell.getCellStyle().getDataFormatString());
						if ("@".equals(cell.getCellStyle().getDataFormatString())) {
							value = df.format(cell.getNumericCellValue());
						} else if ("General".equals(cell.getCellStyle().getDataFormatString())) {
							value = nf.format(cell.getNumericCellValue());
						} else {
							value = sdf.format(HSSFDateUtil.getJavaDate(cell.getNumericCellValue()));
						}
						break;
					case XSSFCell.CELL_TYPE_BOOLEAN:
						// System.out.println(i+"行"+j+" 列 is Boolean type");
						value = cell.getBooleanCellValue();
						break;
					case XSSFCell.CELL_TYPE_BLANK:
						// System.out.println(i+"行"+j+" 列 is Blank type");
						value = "";
						break;
					default:
						// System.out.println(i+"行"+j+" 列 is default type");
						value = cell.toString();
				}
				if (value == null || "".equals(value)) {
                    value="";
				}
				linked.add(value);
			}
			list.add(linked);
		}
		return list;
	}

	/*
	 * 测试
	 *
	 * @Author： 吴联发
	 *
	 * @Date：2018年5月11日上午10:54:01
	 */
	/*public static void main(String[] args) throws IOException {
		// excel 导入数据demo
		File file = new File("D:\\aaaa\\工作表.xlsx");
		List<List<Object>> dataList = importExcel(file);
		for (int i = 0; i < dataList.size(); i++) {
			for (int j = 0; j < dataList.get(i).size(); j++) {
				System.out.println(dataList.get(i).get(j));
			}
			System.out.println("------------------");
		}
	}*/
}
